[Form 4] CABOT CORP Insider Trading Activity

Rhea-AI Filing Summary

Karen A. Kalita, SVP and General Counsel of Cabot Corporation (CBT), reported a non-derivative acquisition on 09/11/2025 of Phantom Stock Units that convert 1-for-1 into common stock. The filing shows 4,223.7236 underlying shares reported following the transaction and lists a per-share value/price of $81.47. The units represent dividends paid on phantom stock under the Corporation's Supplemental 401(k) Plan and are to be settled upon the reporting person's retirement or other termination of employment. The Form 4 was signed pursuant to a power of attorney on 09/15/2025.

Positive

• Timely and compliant disclosure of the insider transaction under Section 16
• Clear explanation that the units are dividend-related phantom stock tied to the Supplemental 401(k) Plan

Negative

• None.

Insights

Financial Analyst

TL;DR: Routine compensation-related acquisition of phantom units; limited near-term market impact.

The Form 4 documents an acquisition of phantom stock units tied to Cabot's Supplemental 401(k) Plan rather than an open-market purchase. The transaction increases the reporting person's beneficial ownership by 4,223.7236 shares on a 1-for-1 conversion basis and records a per-share value of $81.47. Because these units are described as dividends to be settled upon retirement or termination, they appear to be part of deferred compensation and not a liquidity-driven market trade. For investors, this is a disclosure of insider holdings from compensation activity rather than a signal of a change in corporate outlook.

Corporate Governance Expert

TL;DR: Disclosure aligns with Section 16 requirements and describes deferred compensation mechanics.

The filing clearly identifies the reporting person as an officer and reports the acquisition code and mechanics: phantom stock units that convert 1-for-1 to common stock and are settled on retirement or termination. The explanation references the Supplemental 401(k) Plan and dividend-related accruals. The timely filing and use of a power of attorney for signature indicate procedural compliance. No governance red flags or departures are indicated within the submission itself.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Kalita Karen A

(Last) (First) (Middle)

C/O CABOT CORPORATION

TWO SEAPORT LANE, SUITE 1400

(Street)

BOSTON MA 02210

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CABOT CORP [ CBT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP and General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
09/11/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Phantom Stock Units	(1)	09/11/2025		A		23.2017		(2)	(2)	Common Stock	23.2017	$81.47	4,223.7236	D

Explanation of Responses:

1. 1 for 1

2. Represents dividends paid on phantom stock units acquired under the Corporation's Supplemental 401(k) Plan and are to be settled upon the reporting person's retirement or other termination of employment.

	By: Jennifer Lombardi, pursuant to a power of attorney from Karen A. Kalita	09/15/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Karen A. Kalita report on Form 4 for CBT?

She reported an acquisition of Phantom Stock Units on 09/11/2025 that convert 1-for-1 into common stock, resulting in 4,223.7236 underlying shares.

Are the phantom stock units settled immediately for CBT shares?

No. The filing states the units "are to be settled upon the reporting person's retirement or other termination of employment."

What value is shown for the reported units in the CBT Form 4?

The Form 4 lists a per-share price/value of $81.47 associated with the reported units.

Was the Form 4 signed on behalf of Karen A. Kalita?

Yes. The form was signed by Jennifer Lombardi pursuant to a power of attorney from Karen A. Kalita on 09/15/2025.